CN205223076U - Nickel plating carbon fiber plate with electromagnetic shielding performance - Google Patents
Nickel plating carbon fiber plate with electromagnetic shielding performance Download PDFInfo
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- CN205223076U CN205223076U CN201520949808.4U CN201520949808U CN205223076U CN 205223076 U CN205223076 U CN 205223076U CN 201520949808 U CN201520949808 U CN 201520949808U CN 205223076 U CN205223076 U CN 205223076U
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Abstract
The utility model discloses a nickel plating carbon fiber plate with electromagnetic shielding performance, including the carbon cloth, the carbon cloth is located electromagnetic shielding performance nickel plating carbon fiber plate's centre, and first nickel coating has been plated respectively on the upper and lower surface of carbon cloth, and it has the copper plate to electroplate on the first nickel coating, and it has the second nickel coating to electroplate on the copper plate, and the suppression has the resin layer on the second nickel coating. Nickel plating carbon fiber plate electromagnetic shielding effectiveness in 150KHz~18GHz's electromagnetic field is greater than 40dB, through the structural design of nickel - copper - nickel three -layer cladding material, can improve the stability of carbon cloth electromagnetic shield effect effectively, combined material's shaping, nickel plating surface of carbon fiber's resin layer have improved the corrosion resisting property of finished piece.
Description
Technical field
The utility model belongs to electromangnetic spectrum field, is specifically related to a kind of nickel-coated carbon fibers plate with capability of electromagnetic shielding.
Background technology
The envelope, cabinet etc. of electromagnetic shielding are the products in common electromagnetic shielding field, and the envelope of electromagnetic shielding, cabinet are made up of the sheet material with electromagnetic shielding, and its fabrication processing is complicated at present.First, in order to ensure the intensity of envelope, the sheet material of envelope generally adopts metal skin to add " sandwich " structure of foam core material, and centre has been provided with the metal frame of support reinforcing effect; Secondly, in order to ensure shield effectiveness, adopting in the lap-joint of sheet material and paste conductive aluminum foil, needing the spacing controlling glue consumption and rivet when installing aluminum corner brace, needing when installing cornerite and annex the spacing etc. of assembling copper wire gauze and controlling rivet to prevent the safeguard procedures of electromagnetic leakage; Finally, in order to ensure sheet material anticorrosion effect, usually envelope assembled complete after, metal skin surface spraying paint, or even heavy antisepsis paint improve the salt spray resistance of envelope under extreme environmental conditions.
There is following defect in current technology: the metal skin in 1, traditional " sandwich " structural panel and framework are all pure metal, cause envelope to there is the problem of Heavy Weight; 2, the salt fog resistance of metal skin is poor; need surface spraying to paint and protection is provided, but along with time lengthening, coming off or crackle easily appears in coat of painting; thus cause mildew or the serious problems such as to get rusty, reduce electromagnet shield effect and the work-ing life of envelope.
Summary of the invention
The purpose of this utility model is to provide a kind of nickel-coated carbon fibers plate with capability of electromagnetic shielding, and the board quality solving electromagnetic shield in prior art weighs, electromagnet shield effect is poor and the technical problem of corrosion-resistant difference.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of nickel-coated carbon fibers plate with capability of electromagnetic shielding, comprise carbon cloth, described carbon cloth is positioned at the centre of capability of electromagnetic shielding nickel-coated carbon fibers plate, the upper and lower surface of carbon cloth is coated with the first nickel layer respectively, first nickel layer is electroplate with copper plate, copper plate is electroplate with the second nickel layer, the second nickel layer is suppressed with resin layer.
Further improvement, described carbon cloth is the twill carbon cloth of T300-3K,
Further improvement, described first nickel plating layer thick is 0.04-0.05mm.
Further improvement, described thickness of coated copper layer is 0.04-0.05mm.
Further improvement, described second nickel plating layer thick is 0.04-0.05mm.
Further improvement, described nickel-coated carbon fibers plate is greater than 40dB at the elect magnetic field electromagnet shield effect of 150KHZ ~ 18GHZ, meets the requirement of general military electronic effectiveness of shielding.
Further improvement, the thickness of described nickel-coated carbon fibers plate is 0.9-1mm, meets light, high-strength, the erosion-resisting performance requriements of quality.
The plurality of advantages such as carbon cloth has lightweight, high-strength, anticorrosive, ageing-resistant, good endurance, anti-seismic performance are good, stable physical property, its tensile strength is 7-10 times of equal cross-section steel.The nickel-coated carbon fibers plate quality adopting carbon cloth to make as base material is light, is convenient to carrying; High-strength performance guarantee in use not easily by outside destroy, corrosion resistance nature then further increase nickel-coated carbon fibers plate work-ing life, reduce cost.
This nickel-coated carbon fibers plate is adopted and is made with the following method:
Step one, carbon cloth surface scrubbing: removing is adsorbed on pollutent and the organic active agent on carbon cloth surface, for subsequent handling provides good coating environment, ensures the bonding force of coating and carbon cloth.
Step 2, the nickel plating of carbon cloth surface magnetic control sputtering: adopt magnetron sputtering technique to carry out vacuum nickel plating to the carbon cloth surface after step one processes, by the surface of uniform for the nickel ion of nanoparticle morphology spraying plating to carbon cloth, form the first nickel layer, the travel rate of carbon cloth in magnetron sputtering nickel plating equipment is 90 ~ 100m/h.Because the conductivity of copper, capability of electromagnetic shielding comparatively nickel are better, but copper not easily direct plating is surperficial at carbon cloth, so needed first to plate one deck nickel as copper-plated basic unit on carbon cloth before copper facing, and adopting magnetron sputtering technique nickel plating, the nickel film that nickel ion sedimentation rate is fast, sputtering obtains is combined better with carbon cloth.
Step 3, electro-coppering: adopt the mode of plating to a nickel-coated carbon fibers cloth copper coating, the current density of described electro-coppering is 180 ~ 200A/dm2, voltage is 8V ~ 10V, the travel rate of a nickel-coated carbon fibers cloth in copper facing electrolytic plating pool is 4 ~ 6m/h, during copper facing, the temperature of electroplate liquid is 40 ~ 45 DEG C, form copper plate, copper electroplating layer ensure that this carbon cloth has better conductivity and capability of electromagnetic shielding.Adopt plating solution for copper-plating used of the prior art can realize this step.
Step 4, electronickelling: adopt the mode of plating to the nickel plating of copper carbon fiber cloth surface second, the current density of described electronickelling is 180 ~ 200A/dm2, voltage is 8V ~ 10V, the travel rate of copper carbon fiber cloth in nickel plating electrolytic plating pool is 4 ~ 6m/h, during nickel plating, the temperature of electroplate liquid is 40 ~ 45 DEG C, forms the second nickel layer; Because copper electroplating layer is easily oxidized, thus need plate on copper electroplating layer one deck nickel alignment protect.Adopt nickel-plating bath of the prior art can realize this step.
Step 5, drying: the residual electroplate liquid on removing secondary nickel-coated carbon fibers cloth surface, and it is dried.
Step 6, be pressed into plate: the secondary nickel-coated carbon fibers cloth after step 5 process and resin are suppressed formation and has capability of electromagnetic shielding nickel-coated carbon fibers plate, resin layer covers the surface of whole secondary nickel-coated carbon fibers cloth, and the thickness of nickel-coated carbon fibers plate is 1mm.Because nickel-coated carbon fibers cloth is soft, needs to increase resin layer and improve intensity, after resin solidification, play the effect of sizing and protecting cloth; improve the corrosion resistance nature of nickel-coated carbon fibers cloth; but resin should not be too thick, because the density of resin is comparatively large, the blocked up weight that can increase sheet material.
Further improvement, in described step 5, carry out to secondary nickel-coated carbon fibers cloth the residual electroplate liquid that surface is gone in tertiary effluent eccysis, described bake out temperature is 160 ~ 170 DEG C, and the travel rate of carbon cloth in baker is 4 ~ 6m/h.Must dry secondary nickel-coated carbon fibers cloth after secondary nickel plating plating terminates, prevent from getting rusty.
Further improvement, in described step one, the mode of ion bombardment is adopted to remove the pollutent and promoting agent that are adsorbed on carbon cloth surface, the travel rate of carbon cloth in trash-removal device is 90 ~ 100m/h, the promoting agent on carbon cloth surface is vaporized, and controls the degree for the treatment of of carbon cloth surface contaminants according to the boil-off gas scale of construction.
Further improvement, after described step 3 terminates, carries out to copper carbon fiber cloth the raffinate that cloth surface is gone in tertiary effluent eccysis, again through individual layer 95 ~ 100 DEG C oven dry, because likely step 3 does not carry out step 4 after terminating immediately, prevent coating from getting rusty, need to carry out drying and processing.
Further improvement, also comprises step 7, adopts following steps to be linked to be the large plate with capability of electromagnetic shielding by size overlap joint the multiple nickel-coated carbon fibers plates made through step 6:
(1), high energy laser ablates is adopted to fall the resin layer of each nickel-coated carbon fibers plate clinch.Because two existence with capability of electromagnetic shielding nickel-coated carbon fibers plate surface resin layer, can cause conduction to be obstructed, then be certain to there is electromagnetic exposure, thus must eliminate the resin layer on faying surface.
(2), conductive liquid is brushed at the clinch of the nickel-coated carbon fibers plate processed through step (1); Conducting between the nickel layer of two nickel-coated carbon fibers plates that guarantee overlaps mutually.
(3), each nickel-coated carbon fibers plate processed through step (2) overlap joint is combined into large plate, at nickel-coated carbon fibers plate clinch coated with conductive glue, and fine for multiple nickel-plated carbon plate to be linked together the large plate made and there is capability of electromagnetic shielding in conjunction with securing gear.Conductive resin is used for the lap gap between sealing two nickel-coated carbon fibers plates, prevents hertzian wave from revealing from lap gap, ensures that the electromagnet shield effect overlapping the large plate be linked to be meets the demands.
Further improvement, described conductive resin is ZB2561 organosilicon conductive adhesive, and ZB2561 organosilicon conductive adhesive is that Nanjing Zhong Bei Electronics Co., Ltd. produces, and has good elasticity very toughness, stable performance, volume specific resistance 10
-3Ω cm.
The principle of electromagnetic shielding: can produce two kinds of situations when hertzian wave arrives shielding surface: discontinuous 1, due to impedance on the interface of air and metal, produces incident electromagnetic wave and reflects; 2, non-shielded body surface reflection falls and enters the hertzian wave of shielding, in shielding forward direction process in, conductively-closed material decayed, namely so-called absorption; And the dump energy not yet attenuated in shielding, when passing to another surface of shielding, run into the interface of metal-air impedance discontinuity, secondary reflection again can be formed, and return in shielding, this interface being reflected in two metals may there is reflection repeatedly.In a word, electromagnetic shield to the decay of electromagnetism mainly based on electromagnetic reflection and electromagnetic absorption.Copper is because have good conductivity, and have good attenuation by absorption performance to hertzian wave, the copper plate therefore done in invention nickel-coated carbon fibers plate has good capability of electromagnetic shielding.
The utility model compared with prior art has following beneficial effect:
1, the nickel-coated carbon fibers plate quality adopting carbon cloth to make as base material is light, is convenient to carrying; High-strength performance guarantee in use not easily by outside destroy, corrosion resistance nature then further increase nickel-coated carbon fibers plate work-ing life, reduce cost.
2, by the structure design of nickel-copper-nickel three layers of coating, a nickel plating is that copper facing provides good basis, and secondary nickel plating is then protected copper plate, anti-oxidation, effectively improves the stability of nickel-coated carbon fibers plate effectiveness.
3, the resin layer on nickel-coated carbon fibers surface improves nickel-coated carbon fibers plate intensity, is convenient to the making of postorder electromagnetic casing screen.
4, the weight of nickel-coated carbon fibers plate increase only about 20%, meets the light-weighted requirement of electromagnetic protection body.
5, seal the lap gap between two nickel-coated carbon fibers plates by filled conductive glue, prevent hertzian wave from revealing from lap gap, ensure that the electromagnet shield effect overlapping the large plate be linked to be meets the demands.
Accompanying drawing explanation
Fig. 1 is the Making programme figure of nickel-coated carbon fibers fabric swatch described in the utility model.
Fig. 2 is the end face structure signal of nickel-coated carbon fibers fabric swatch described in the utility model.
Embodiment
For making the purpose of this utility model and technical scheme clearly, below in conjunction with the utility model embodiment, the technical solution of the utility model is clearly and completely described.
Embodiment one:
Adopt following steps to make and there is capability of electromagnetic shielding nickel-coated carbon fibers cloth:
Step one, carbon cloth surface scrubbing: adopt the mode of ion bombardment to remove the pollutent and promoting agent that are adsorbed on carbon cloth 1 surface, the travel rate of carbon cloth 1 in trash-removal device is 90m/h, the promoting agent on carbon cloth 1 surface is vaporized, control the degree for the treatment of of carbon cloth surface contaminants according to the boil-off gas scale of construction, described carbon cloth 1 is the twill carbon cloth of T300-3K.
Step 2, the nickel plating of carbon cloth surface magnetic control sputtering: adopt magnetron sputtering technique to carry out vacuum nickel plating to carbon cloth 1 surface after step one processes, by the surface of uniform for the nickel ion of nanoparticle morphology spraying plating to carbon cloth, obtain first time nickel layer 2, form a nickel-coated carbon fibers cloth, the travel rate of carbon cloth in magnetron sputtering nickel plating equipment is 90m/h.
Step 3, electro-coppering: adopt the mode of plating to a nickel-coated carbon fibers cloth copper coating, the current density of described electro-coppering is 180A/dm2, voltage is 8V, the width of copper facing electrolytic plating pool is 1.2m, length is 2m, and the treatment rate of a nickel-coated carbon fibers cloth in copper facing electrolytic plating pool is 4m/h, and during copper facing, the temperature of electroplate liquid is 40 DEG C, obtain copper plate 3, form copper carbon fiber cloth, the raffinate that cloth surface is gone in tertiary effluent eccysis is carried out to copper carbon fiber cloth, then through individual layer 95 DEG C oven dry.
Four, electronickelling: adopt the mode of plating to the nickel plating of copper carbon fiber cloth surface second, the current density of described electronickelling is 180A/dm2, voltage is 8V, the width of nickel plating electrolytic plating pool is 1.2m, length is 2m, the treatment rate of carbon cloth in nickel plating electrolytic plating pool is 4m/h, during nickel plating, the temperature of electroplate liquid is 40 DEG C, obtains second time nickel layer 4, forms secondary nickel-coated carbon fibers cloth.
Step 5, drying: the residual electroplate liquid that surface is gone in tertiary effluent eccysis is carried out to secondary nickel-coated carbon fibers cloth, again the secondary nickel-coated carbon fibers cloth washed through tertiary effluent is dried, bake out temperature is 160 DEG C, and the travel rate of carbon cloth in baker is 4m/h.
According to the nickel-coated carbon fibers cloth that above-mentioned steps is made, the thickness of coating of magnetron sputtering nickel plating is 0.045mm.The thickness of coating of electro-coppering is 0.045mm, and the thickness of coating of electronickelling is 0.045mm.
Embodiment two:
Adopt following steps to make and there is capability of electromagnetic shielding nickel-coated carbon fibers cloth:
Step one, the surperficial scrubbing of carbon cloth 1: adopt the mode of ion bombardment to remove the pollutent and promoting agent that are adsorbed on carbon cloth 1 surface, the travel rate of carbon cloth in trash-removal device is 100m/h, the promoting agent on carbon cloth surface is vaporized, the degree for the treatment of of carbon cloth surface contaminants is controlled according to the boil-off gas scale of construction, described carbon cloth is the twill carbon cloth of T300,3K.
Step 2, the nickel plating of carbon cloth surface magnetic control sputtering: adopt magnetron sputtering technique to carry out vacuum nickel plating to the carbon cloth surface after step one processes, by the surface of uniform for the nickel ion of nanoparticle morphology spraying plating to carbon cloth, obtain first time nickel layer 2, form a nickel-coated carbon fibers cloth, the travel rate of carbon cloth in magnetron sputtering nickel plating equipment is 100m/h.
Step 3, electro-coppering: adopt the mode of plating to a nickel-coated carbon fibers cloth copper coating, the current density of described electro-coppering is 200A/dm
2voltage is 10V, the width of copper facing electrolytic plating pool is 1.2m, length is 2m, the treatment rate of a nickel-coated carbon fibers cloth in copper facing electrolytic plating pool is 6m/h, during copper facing, the temperature of electroplate liquid is 45 DEG C, obtains copper plate 3, forms copper carbon fiber cloth, the raffinate that cloth surface is gone in tertiary effluent eccysis is carried out to copper carbon fiber cloth, then through individual layer 95 DEG C oven dry.
Four, electronickelling: adopt the mode of plating to the nickel plating of copper carbon fiber cloth surface second, the current density of described electronickelling is 200A/dm
2, voltage is 10V, and the width of nickel plating electrolytic plating pool is 1.2m, length is 2m, and the treatment rate of carbon cloth in nickel plating electrolytic plating pool is 6m/h, and during nickel plating, the temperature of electroplate liquid is 45 DEG C, obtains second time nickel layer 4, forms secondary nickel-coated carbon fibers cloth.
Step 5, drying: the residual electroplate liquid that surface is gone in tertiary effluent eccysis is carried out to secondary nickel-coated carbon fibers cloth, again the secondary nickel-coated carbon fibers cloth washed through tertiary effluent is dried, bake out temperature is 170 DEG C, and the travel rate of carbon cloth in baker is 6m/h.
According to the nickel-coated carbon fibers cloth that above-mentioned steps is made, the thickness of coating of magnetron sputtering nickel plating is 0.0427mm.The thickness of coating of electro-coppering is 0.0427mm, and the thickness of coating of electronickelling is 0.0427mm.
Comparative example one:
For the carbon cloth of T300,3K twill.
Embodiment one, two is compared with comparative example one:
Carry out characteristic measurement to the carbon cloth made in the nickel-coated carbon fibers cloth made in embodiment one, two and comparative example one, measurement result is as shown in table 1.
Table 1 three kinds of cloth performance comparison
Shown by table 1:
(1), by nickel plating-the made carbon cloth of copper facing-nickel plating compares carbon cloth quality in ratio one only increase about 20%, meet lightweight requirement;
(2) resistance value, by nickel plating-made carbon cloth of copper facing-nickel plating comparing carbon cloth in ratio one declines, and conductive capability significantly rises.
Embodiment three:
As shown in Figure 1, 2, compared with embodiment one, the secondary nickel-coated carbon fibers cloth after step 5 process and resin are suppressed formation and has capability of electromagnetic shielding nickel-coated carbon fibers plate, resin layer 5 covers the surface of whole secondary nickel-coated carbon fibers cloth.Other steps are identical with embodiment one makes nickel-coated carbon fibers plate.
Embodiment four:
Compared with embodiment two, secondary nickel-coated carbon fibers cloth after step 5 process and resin are suppressed formation there is capability of electromagnetic shielding nickel-coated carbon fibers plate, resin layer 5 covers the surface of whole secondary nickel-coated carbon fibers cloth, the thickness of resin layer is identical with embodiment three, and other steps are identical with embodiment two makes nickel-coated carbon fibers plate.
Comparative example two:
Adopt the carbon cloth of T300,3K twill, this carbon cloth and resin are suppressed and form carbon fiber board, resin layer covers the surface of whole carbon cloth, the thickness of resin layer and identical in embodiment three, four.
Embodiment three, four is compared with comparative example two:
Detect the capability of electromagnetic shielding of nickel-coated carbon fibers plate and carbon fiber board, carry out electromagnet shield effect test according to the regulation of GB/T12190-2006, the result drawn is as shown in table 2.
Table 2 electromagnetic frequency and effectiveness of shielding graph of a relation
As can be seen from Table 2, when wave frequency is between 150K ~ 18G, the electromagnet shield effect of nickel-coated carbon fibers plate is all greater than 40dB, meets the requirement of general military electronic effectiveness of shielding.
Embodiment five:
Compared with embodiment three, embodiment lacks the process of secondary nickel plating, and other steps are identical with embodiment three makes copper carbon fiber plate.
Embodiment three is compared with embodiment five:
Carry out salt-fog test respectively to by the nickel-coated carbon fibers plate made of embodiment three and the made copper carbon fiber plate of embodiment five: salt-fog test detects the Main Means of nickel-coated carbon fibers plate corrosion resistance nature, embodiment one and comparative example two made carbon fiber board surface-brightening, lines be clear, without the defect such as starved and pinprick.According in GJB150.11A-2009 7.2 condition carry out salt-fog test, test period 144h (72h spray salt fog and 72h drying program).Laboratory test results shows: have obvious verdigris without Nickel Plating Treatment made carbon fiber board carbon cloth surface in embodiment five, show that resin layer is corroded, copper plate directly contacts in atmosphere with NaCl solution, and galvanic corrosion occurs, and copper plate is destroyed.In embodiment three through Nickel Plating Treatment made carbon fiber board surface still smooth, bright, without metallic corrosion impurity such as verdigris, show that nickel layer plays the effect of protection copper plate, ensure that carbon fiber board has good electromagnet shield effect.
In sum, nickel-coated carbon fibers plate described in the utility model have lightweight, electromagnet shield effect good, corrosion-resistant strong advantage.
Do not do in the utility model illustrate be prior art or can be realized by prior art, and described in the utility model, concrete case study on implementation is only better case study on implementation of the present utility model, is not used for limiting practical range of the present utility model.Namely all equivalences done according to the content of the utility model claim change and modify, all should as technology category of the present utility model.
Claims (7)
1. one kind has the nickel-coated carbon fibers plate of capability of electromagnetic shielding, it is characterized in that, comprise carbon cloth (1), described carbon cloth (1) is positioned at the centre of capability of electromagnetic shielding nickel-coated carbon fibers plate, the upper and lower surface of carbon cloth (1) is coated with the first nickel layer (2) respectively, first nickel layer (2) is electroplate with copper plate (3), copper plate (3) is electroplate with the second nickel layer (4), the second nickel layer (4) is suppressed with resin layer (5).
2. there is the nickel-coated carbon fibers plate of capability of electromagnetic shielding according to claim 1, it is characterized in that, the twill carbon cloth that described carbon cloth (1) is T300-3K.
3. have the nickel-coated carbon fibers plate of capability of electromagnetic shielding according to claim 1, it is characterized in that, described first nickel layer (2) thickness is 0.04-0.05mm.
4. have the nickel-coated carbon fibers plate of capability of electromagnetic shielding according to claim 1, it is characterized in that, described copper plate (3) thickness is 0.04-0.05mm.
5. have the nickel-coated carbon fibers plate of capability of electromagnetic shielding according to claim 1, it is characterized in that, described second nickel layer (4) thickness is 0.04-0.05mm.
6. have the nickel-coated carbon fibers plate of capability of electromagnetic shielding according to claim 1, it is characterized in that, described nickel-coated carbon fibers plate is greater than 40dB at the elect magnetic field electromagnet shield effect of 150KHz ~ 18GHz.
7. have the nickel-coated carbon fibers plate of capability of electromagnetic shielding according to claim 1, it is characterized in that, the thickness of described nickel-coated carbon fibers plate is 0.9-1mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520949808.4U CN205223076U (en) | 2015-11-24 | 2015-11-24 | Nickel plating carbon fiber plate with electromagnetic shielding performance |
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| CN201520949808.4U CN205223076U (en) | 2015-11-24 | 2015-11-24 | Nickel plating carbon fiber plate with electromagnetic shielding performance |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593081A (en) * | 2016-12-16 | 2017-04-26 | 成都佰思汇信科技有限责任公司 | Fence for power construction |
| CN112595172A (en) * | 2021-01-05 | 2021-04-02 | 中国电子科技集团公司第三十三研究所 | Strong electromagnetic pulse protection method for composite material launching canister |
| CN113677179A (en) * | 2021-09-28 | 2021-11-19 | 郑州佛光发电设备有限公司 | Electromagnetic shielding composite material and preparation method thereof |
| CN116005451A (en) * | 2023-01-07 | 2023-04-25 | 贺州学院 | Preparation method of electromagnetic shielding material and electromagnetic shielding material |
-
2015
- 2015-11-24 CN CN201520949808.4U patent/CN205223076U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593081A (en) * | 2016-12-16 | 2017-04-26 | 成都佰思汇信科技有限责任公司 | Fence for power construction |
| CN112595172A (en) * | 2021-01-05 | 2021-04-02 | 中国电子科技集团公司第三十三研究所 | Strong electromagnetic pulse protection method for composite material launching canister |
| CN113677179A (en) * | 2021-09-28 | 2021-11-19 | 郑州佛光发电设备有限公司 | Electromagnetic shielding composite material and preparation method thereof |
| CN116005451A (en) * | 2023-01-07 | 2023-04-25 | 贺州学院 | Preparation method of electromagnetic shielding material and electromagnetic shielding material |
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